/**
 * Copyright (C) 2001-2017 by RapidMiner and the contributors
 * 
 * Complete list of developers available at our web site:
 * 
 * http://rapidminer.com
 * 
 * This program is free software: you can redistribute it and/or modify it under the terms of the
 * GNU Affero General Public License as published by the Free Software Foundation, either version 3
 * of the License, or (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
 * even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Affero General Public License for more details.
 * 
 * You should have received a copy of the GNU Affero General Public License along with this program.
 * If not, see http://www.gnu.org/licenses/.
*/
package com.rapidminer.tools;

import com.rapidminer.RapidMiner;

import java.io.PrintStream;
import java.util.Map;
import java.util.logging.Level;


/**
 * Sends a mail via sendmail.
 * 
 * @author Simon Fischer, Ingo Mierswa
 */
public class MailSenderSendmail implements MailSender {

	@Override
	public void sendEmail(String address, String subject, String content, Map<String, String> headers) throws Exception {
		String command = ParameterService.getParameterValue(RapidMiner.PROPERTY_RAPIDMINER_TOOLS_SENDMAIL_COMMAND);
		if (command == null || command.isEmpty()) {
			// LogService.getRoot().warning("Must specify sendmail command to use sendmail.");
			LogService.getRoot().log(Level.WARNING, "com.rapidminer.tools.MailSenderSendMail.specify_sendmail_command");
		} else {
			// LogService.getRoot().fine("Executing '" + command + "'.");
			LogService.getRoot().log(Level.FINE, "com.rapidminer.tools.MailSenderSendMail.executing_command", command);
			if (headers != null && !headers.isEmpty()) {
				// LogService.getRoot().warning("Mail headers ignored for sendmail. Please use SMTP.");
				LogService.getRoot().log(Level.WARNING,
						"com.rapidminer.tools.MailSenderSendMail.ignoring_mail_headers_for_sendmail");
			}
			Process sendmail = Runtime.getRuntime().exec(new String[] { command, address });
			PrintStream out = null;
			try {
				out = new PrintStream(sendmail.getOutputStream());
				out.println("Subject: " + subject);
				out.println("From: RapidMiner");
				out.println("To: " + address);
				out.println();
				out.println(content);
			} catch (Exception e) {
				throw e;
			} finally {
				if (out != null) {
					out.close();
				}
			}
			Tools.waitForProcess(null, sendmail, command);
		}
	}
}